What happens when a tsunami approaches the shore?
a. Its velocity drops rapidly.
b. Its period remains the same.
c. Its wave height increases
d. All of these choices
ANS: D
Even though there are drastic changes to the wave as it approached shore, it does not have a huge crest.
It surges ashore much like a very fast tide would. Information can be found in the section Water
Displacement Causes Tsunamis and Seismic Sea Waves.
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Why is a pycnocline NOT found at high latitudes?
a. The transition zone occurs below the floor of the ocean. b. The transition zone cannot occur with the warm temperatures associated with high latitudes. c. There is no transition zone between the warm, low-density surface water and the warm, lowdensity deep water. d. There is no transition zone between the warm, low-density surface water and the cold, highdensity deep water. e. There is no transition zone between the cold, high-density surface water and the cold, highdensity deep water at high latitudes.
China has relatively large proven reserves of
A) coal. B) petroleum. C) natural gas. D) tar sandstone. E) All of the above
About 50% of laborers migrating from Tajikistan have gone to the city of:
A) New York B) Tehran C) Moscow D) Paris
The Cassini gap refers to the planetless belt of asteroids between Mars and Earth
Indicate whether the statement is true or false